1376823845 has 4 divisors (see below), whose sum is σ = 1652188620. Its totient is φ = 1101459072.

The previous prime is 1376823841. The next prime is 1376823883. The reversal of 1376823845 is 5483286731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5483286731 = 13 ⋅421791287.

It can be written as a sum of positive squares in 2 ways, for example, as 454243969 + 922579876 = 21313^2 + 30374^2 .

It is a cyclic number.

It is not a de Polignac number, because 1376823845 - 2² = 1376823841 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1376823845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1376823841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137682380 + ... + 137682389.

It is an arithmetic number, because the mean of its divisors is an integer number (413047155).

Almost surely, 2^1376823845 is an apocalyptic number.

It is an amenable number.

1376823845 is a deficient number, since it is larger than the sum of its proper divisors (275364775).

1376823845 is an equidigital number, since it uses as much as digits as its factorization.

1376823845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275364774.

The product of its digits is 967680, while the sum is 47.

The square root of 1376823845 is about 37105.5770066981. The cubic root of 1376823845 is about 1112.4814880562.

The spelling of 1376823845 in words is "one billion, three hundred seventy-six million, eight hundred twenty-three thousand, eight hundred forty-five".